And protein kinase A (PKA) activity specifically in the GABA cells of this circuit BELOW. GABA
Dopamine
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It is known that this upregulated CAMP increases the probability of GABA release from the GABA
neurons in this circuit. There are a number of ways in which cAMP through activation of PKA could
increase release probability. Mark all mechanisms below that could produce increased release
probability of GABA
Phosphorylation by PKA of the mu opioid receptors on the GABA terminals increases the constitutive activity
of the mu opioid receptors.
Phosphorylation by PKA of a Calcium channel increases the number of calcium channels in the GABA
terminals
Phosphorylation by PKA of the GABA-A receptors in the GABA neuron increases their affinity for GABA
Phosphorylation by PKA of the mu opioid receptors promotes their desensitization
Phosphorylation by PKA of mu opioid receptors on the GABA terminals switches their coupling to Go
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